I cant send emails via Outlook in my W10 PC.

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Mac

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Outlook version
Outlook 2010 32 bit
Email Account
POP3
I cant send emails via Outlook in my W10 PC.

About a week ago I had this problem when sending emails, which occurred on the Friday but it cleared after about 2 days.
But the same problem has re-occured this Saturday, and is still there today.

I send & receive all of my emails via my W10 PC,
using Outlook (inculded with MS Pro Plus 2010)

I have several Hotmail email accounts, and I can send and receive these OK.
These are setup as type: MS Exchange

The problem is with all of the other emails accounts, that are setup on several websites that I have, which are all hosted via the same hosting company.
These are setup as type: pop/SMTP
I can receive these email for these accounts in Outlook,
but I cant send from these email accounts in Outlook.

They all fail with this same error message:
Task 'xxxx@xxxxx.com - Sending' reported error (0x800CCC78) : 'Cannot send the message. Verify the e-mail address in your account properties. The server responded: 550 Access denied - Invalid HELO name (See RFC2821 4.1.1.1)'

NB: above, xxxx@xxxxx.com is the the email address that fails.

NB: I dont know if this problem is due tp my PC/Outlook or my Hosting company.

Also, I dont know if this is related:
At about the same time my Firefox browser has difficuly re-loading the tabs,
that I left open after I re-start from the sleep mode.
The empty tabs load, but the page content ether takes ages to load, or fails to load at all,
and FF closes, and then I have to re-open FF to start again.

Your help would be greatly appreciated.
Many thanks
 
I don't think the Firefox problem is related.

What port number are you using? Do you have outlook set to use the incoming username and password to log in?

Who is your hosting company?
Hi Diane, thanks for the reply.
I've been using the same setup for many, many years, so yes the username and passwords are setup for all of these emails, it's just started to fail these last 2 weekends.

They are hosted with Hostgator.
 
Are you using the secure ports? gator1234 is your server hostname, in your Customer Portal's Settings section
POPIncoming Server: gator1234.hostgator.com
Incoming Port: 995
IMAPIncoming Server: gator1234.hostgator.com
Incoming Port: 993
SSL (Optional)Enabled
Outgoing Server AuthenticationEnabled
(The outgoing mail server does require authentication.
Check any boxes that might say "Use name and password.")
Outgoing ServerOutgoing Server: gator1234.hostgator.com
Outgoing PortOutgoing Port: 465
 
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